When to paint a house exterior in Boulder, CO
When to paint in Boulder, CO
A short season: book early and expect weather delays. The painting window is June to August, and even that is thin, with 0 good months a year. The best month is August, at about 12 painting days. Book a painter by April.
If you want the house done in June to August, call for quotes in April or earlier; a job pushed past August is likely to wait until next year. For a deck, the months with enough staining days to spare are Jun, Aug, Sep.
- under 1Jan
- under 1Feb
- under 1Mar
- 1Apr
- 2May
- 9Jun
- 7Jul
- 12Aug
- 6Sep
- 1Oct
- under 1Nov
- under 1Dec
Month by month
| Month | Painting days | Staining days | With low-temp paint | Avg low / high |
|---|---|---|---|---|
| January | under 1 | under 1 | under 1 | 18° / 48°F |
| February | under 1 | under 1 | 2 | 22° / 52°F |
| March | under 1 | under 1 | 3 | 26° / 59°F |
| April | 1 | 1 | 13 | 34° / 69°F |
| May | 2 | 2 | 27 | 42° / 76°F |
| June | 9 | 9 | 16 | 52° / 88°F |
| July | 7 | 3 | 8 | 57° / 93°F |
| August | 12 | 9 | 13 | 55° / 91°F |
| September | 6 | 5 | 21 | 48° / 86°F |
| October | 1 | 1 | 16 | 35° / 71°F |
| November | under 1 | under 1 | 3 | 25° / 58°F |
| December | under 1 | under 1 | 1 | 20° / 51°F |
Deck stain does best in August. Low-temperature paint adds about 87 days a year here.
Towns near Boulder compared
1 gets fewer, down to 22 a year. A gap like that between towns is usually elevation, a coast or a lake, which is why a painter from a few towns over can be on a different schedule. Louisville, Superior, Lafayette, Erie, Broomfield are read from the same station as Boulder, so their numbers match; the real difference is the distance from that station.
| Place | From Boulder | Painting days a year | Window | Station |
|---|---|---|---|---|
| Louisville, CO | 7 mi southeast | 36 | June to August | same station |
| Superior, CO | 8 mi southeast | 36 | June to August | same station |
| Lafayette, CO | 8 mi east | 36 | June to August | same station |
| Erie, CO | 11 mi east | 36 | June to August | same station |
| Broomfield, CO | 12 mi southeast | 36 | June to August | same station |
| Longmont, CO | 13 mi northeast | 22 | none reliable | Vance Brand Airport |
How Boulder ranks in CO
Of 53 CO places with 10,000 people or more, Boulder (population 106,803, 12th largest) ranks 16th for painting days, right at the state median of 36. The longest season in the state is Cañon City, 71 days, 109 miles south. The shortest is Glenwood Springs at 12. Switching to low-temperature paint here is worth 87 extra days, more than most of the summer months on their own.
Where these numbers come from
Daily records from Erie Municipal Airport (10.7 miles away), 2015 to 2024, NOAA Global Summary of the Day. A month is good at 12+ painting days and possible at 6+.